Mercury from Source Audio is a stereo flanger pedal with three effects algorithms, capable of a vast array of modulated sounds. Classic mode is reminiscent of early flanger pedals with deep movement. Thru-zero (or tape flange) emulates the twisting effect that occurs when dry and modulating signals intersect. Shadow mode imparts a highly resonant and smooth tone, capable of the dramatic whooshing flanging sound that occupies a special place in flanger fans' hearts.